Pain point · Self-hosting & upgrades · Causes churn
NULL-to-string scan errors block workflows after upgrade to 1.27.0
3 source threads · first seen 2023-01 · last seen 2025-09
Summary
After upgrading, history lookups fail with a NULL scan error on a column, making start operations unavailable and preventing system workflows from starting.
- Affects
- Self-hosters on SQL persistence
Evidence
Excerpts are copied word for word from the source; follow the link to read it in full.
“internal clients in a standalone, containerized Temporal service are unable to establish connections to the internal frontend service”
“error converting NULL to string is unsupported after upgrade to v1.27.0”
“We did not see this problem in 1.18.x”